What does Glennis mean?
Glennis \g-lennis, gl(en)-nis\ as a name for girls. Glennis' name origin is Welsh, and Glennis means "holy". Glennis is a variant of Glenys (Welsh). Glennis is also a variation of Glynis (Welsh): related to Glenn and its variants.
Glennis has 1 more different form via Glenys, Glynis: Glynae.
Glennis is a somewhat popular first name for females (#2516 out of 4276, Top 59%) but a rare surname for all people. (2000 U.S. Census)
Below is a graphed comparison of the popularity of Glennis and related names. The only prominent related form of Glennis (#unlisted) is Glynis. These girl names were at the height of their popularity during 1960-1969 (usage of 0.016%) and have become less popular since. (Top 1000 Birth Names Records, 2014)
A recommended similar baby name is Glennie. Like Glennis, this name is not commonly used.